DS1629S/T&R Maxim Integrated Products, DS1629S/T&R Datasheet - Page 16

• Manufacturer Part Number: DS1629S/T&R
• Description: IC THERM/RTC/CALENDAR DIG 8-SOIC
• Manufacturer: Maxim Integrated Products

Specifications of DS1629S/T&R

• Function: Thermometer, Thermostat
• Topology: ADC, Comparator, Oscillator, Register Bank
• Sensor Type: Internal
• Sensing Temperature: -55°C ~ 125°C
• Output Type: I²C™/SMBus™
• Output Alarm: Yes
• Output Fan: No
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -55°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Full Temp Accuracy: +/- 2 C
• Digital Output - Bus Interface: Serial (2-Wire)
• Digital Output - Number Of Bits: 9 bit
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 55 C
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Access TH [A1h]
If R/
written to the DS1629, in the format described for thermostat set-points, will set the high temperature
threshold for operation of the ALRM output and TAF/TAL flags. If R/
register is read back.
Access TL [A2h]
If R/
written to the DS1629, in the format described for thermostat set-points, will set the high temperature
threshold for operation of the ALRM output and TAF flag. If R/
is read back.
Access Memory [17h]
This command instructs the DS1629 to access the user-SRAM array, starting with the specified byte
address. Read/write depends upon the state of the R/
all 32 bytes in succession within one command sequence, with the pointer automatically wrapping from
1Fh to 00h; if the master attempts to read/write more than 32 bytes, the address pointer will wrap to the
1
protocol.
DS1629 Command Set Table 8
Access
Configuration
Access
Memory
Start
Convert T
Stop
Convert T
Read
Temperature
Read Counter
Read Slope
Access TH
Access TL
Access Clock
Access Clock
Alarm
st
INSTRUCTION
byte after the 32
W
W
is "0", this command writes to the TH register. After issuing this command, the next two bytes
is "0", this command writes to the TL register. After issuing this command, the next two bytes
PROTOCOL
nd
is read/written and ACK’d by the master/slave. Refer to Figure 6 for command
AAh
ACh
EEh
A8h
A9h
A1h
A2h
C0h
C7h
17h
22h
CONFIGURATION / MEMORY COMMANDS
Writes to 8-bit configuration register
Reads from configuration/status
register
Writes to SRAM array
Read from SRAM array
Initiates temperature conversion(s)
Terminates continuous conversions
Reads COUNT_REMAIN
Sets/Reads Clock
Sets/
Reads Clock Alarm
Reads Temperature Register
Reads COUNT_PER_C
Writes to/Reads from TH register
Writes to/Reads from TL register
THERMOMETER COMMANDS
CLOCK COMMANDS
DESCRIPTION
16 of 22
W
in the 2-wire control byte. The user can read/write
W
is "1", the value stored in this register
2-wire bus data after
Read 1 or 2 data bytes
Read 1 or 2 data bytes
Read 1 or 2 data bytes
Starting Address + N-
Starting Address + N-
Starting Address+N-
Starting Address+N-
Write 2 data bytes
Write 2 data bytes
issuing protocol
Read 1 data byte
Read 1 data byte
1 or 2 data bytes
W
1 data byte
is "1", the value stored in this
bytes
bytes
bytes
bytes
Idle
Idle
NOTES
1, 5
1, 2
1, 5
1, 5
1, 2
1, 2
3
3
4